Update/add since tags (#9627)

server/src/main/java/com/vaadin/data/ValueContext.java

      * Constructor for {@code ValueContext}.
      *
      * @param component
-     *            The component related to current value. Can be null.
-     *            If the component implements {@link HasValue}, it will be returned by {@link #getHasValue()} as well.
+     *            The component related to current value. Can be null. If the
+     *            component implements {@link HasValue}, it will be returned by
+     *            {@link #getHasValue()} as well.
      */
     @SuppressWarnings("unchecked")
     public ValueContext(Component component) {
         Objects.requireNonNull(component,
                 "Component can't be null in ValueContext construction");
         this.component = component;
-        if(component instanceof HasValue) {
+        if (component instanceof HasValue) {
             hasValue = (HasValue<?>) component;
         } else {
             hasValue = null;
      *            The component related to current value. Can be null.
      * @param hasValue
      *            The value source related to current value. Can be null.
+     * @since 8.1
      */
     public ValueContext(Component component, HasValue<?> hasValue) {
         Objects.requireNonNull(component,
     /**
      * Constructor for {@code ValueContext}.
      *
-     * @param
-     *      component
+     * @param component
      *            The component can be {@code null}.
      * @param locale
      *            The locale used with conversion. Can be {@code null}.
      * @param hasValue
-     *            The value source related to current value. Can be {@code null}.
+     *            The value source related to current value. Can be
+     *            {@code null}.
+     * @since 8.1
      */
-    public ValueContext(Component component, HasValue<?> hasValue, Locale locale) {
+    public ValueContext(Component component, HasValue<?> hasValue,
+            Locale locale) {
         this.component = component;
         this.hasValue = hasValue;
         this.locale = locale;
 
     /**
      * Returns an {@code Optional} for the {@code HasValue} used in the value
-     * conversion. In certain complicated cases, ex. cross-field validation, HasValue might be not available.
+     * conversion. In certain complicated cases, ex. cross-field validation,
+     * HasValue might be not available.
      *
      * @return the optional of {@code HasValue}
+     * @since 8.1
      */
     @SuppressWarnings("unused")
     public Optional<HasValue<?>> getHasValue() {

server/src/main/java/com/vaadin/ui/AbstractSplitPanel.java

 
         private final boolean userOriginated;
 
+        /**
+         * Creates a split position change event.
+         *
+         * @param source
+         *            split panel from which the event originates
+         * @param userOriginated
+         *            true if the event is directly based on user actions
+         * @param oldPosition
+         *            old split position
+         * @param oldUnit
+         *            old unit of split position
+         * @param position
+         *            new split position
+         * @param unit
+         *            new split position unit
+         * @since 8.1
+         */
         public SplitPositionChangeEvent(final Component source,
                 final boolean userOriginated, final float oldPosition,
                 final Unit oldUnit, final float position, final Unit unit) {
             return oldUnit;
         }
 
+        /**
+         * {@inheritDoc}
+         *
+         * @since 8.1
+         */
         @Override
         public boolean isUserOriginated() {
             return userOriginated;

server/src/main/java/com/vaadin/ui/Component.java

      */
     public void addStyleName(String style);
 
-
     /**
-     * Adds one or more style names to this component by using one or multiple parameters.
+     * Adds one or more style names to this component by using one or multiple
+     * parameters.
+     *
      * @param styles
      *            the style name or style names to be added to the component
      * @see #addStyleName(String)
      * @see #setStyleName(String)
      * @see #removeStyleName(String)
+     * @since 8.1
      */
-    public default void addStyleNames(String ... styles) {
+    public default void addStyleNames(String... styles) {
         for (String style : styles) {
             addStyleName(style);
         }
     /**
      * Removes one or more style names from component. Multiple styles can be
      * specified by using multiple parameters.
+     *
      * @param styles
      *            the style name or style names to be removed
      * @see #removeStyleName(String)
      * @see #setStyleName(String)
      * @see #addStyleName(String)
+     * @since 8.1
      */
-    public default void removeStyleNames(String ... styles) {
+    public default void removeStyleNames(String... styles) {
         for (String style : styles) {
             removeStyleName(style);
         }

server/src/main/java/com/vaadin/ui/TabSheet.java

      * @param userOriginated
      *            <code>true</code> if the event originates from the client
      *            side, <code>false</code> otherwise
+     * @since 8.1
      */
     public void setSelectedTab(Component component, boolean userOriginated) {
         if (component != null && components.contains(component)
          * @param userOriginated
          *            <code>true</code> if the event originates from the client
          *            side, <code>false</code> otherwise
+         * @since 8.1
          */
         public SelectedTabChangeEvent(Component source,
                 boolean userOriginated) {
             return (TabSheet) getSource();
         }
 
+        /**
+         * {@inheritDoc}
+         *
+         * @since 8.1
+         */
         @Override
         public boolean isUserOriginated() {
             return userOriginated;
      * @param userOriginated
      *            <code>true</code> if the event originates from the client
      *            side, <code>false</code> otherwise
-     * @since
+     * @since 8.1
      */
     protected void fireSelectedTabChange(boolean userOriginated) {
         fireEvent(new SelectedTabChangeEvent(this, userOriginated));